Document Detail

Varying initial-link and terminal-link durations in concurrent-chains schedules: a comparison of three models.
MedLine Citation:
PMID:  15157972     Owner:  NLM     Status:  MEDLINE    
In Experiment 1, pigeons responded on concurrent-chains schedules with equal variable-interval schedules as initial links and fixed delays to food as terminal links. One terminal-link delay was always three times as long as the other. As terminal-link delays increased, response percentages on the key with the shorter terminal link increased according to a curvilinear function. This result supported the predictions of the hyperbolic value-added model and the contextual-choice theory but not delay-reduction theory. In Experiment 2, the terminal links were always delays of 2s and 12s, followed by food, and the durations of the initial links varied across conditions. As initial-link durations increased, pigeons' response percentages on the key with the shorter terminal link decreased, but toward an asymptote greater than 50%, indicating a continued preference for the shorter terminal link with very long initial links. This result was more consistent with the predictions of the hyperbolic-value added model than with those of the contextual-choice model or of delay-reduction theory.
James E Mazur
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Behavioural processes     Volume:  66     ISSN:  0376-6357     ISO Abbreviation:  Behav. Processes     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2005-10-13     Completed Date:  2005-11-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  189-200     Citation Subset:  IM    
Psychology Department, Southern Connecticut State University, New Haven, CT 06515, USA.
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MeSH Terms
Behavior, Animal*
Reinforcement (Psychology)*
Time Factors
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